Beijing Air Quality — Live AQI, PM2.5, and Smog Forecast

Beijing's air quality reflects both urban emissions and regional transport within a broad northern plain setting. Traffic and combustion sources remain important, but citywide episodes often involve secondary particle formation and imported pollution. Under unfavorable meteorology, concentrations can increase rapidly and persist despite local control measures.

Winter typically carries higher risk as heating-related emissions and stable atmospheric layers support PM2.5 buildup. Spring may bring dust events that raise coarse and fine particle levels, while stronger synoptic winds can trigger sharp improvement when cleaner air masses arrive. These contrasting patterns make short-term AQI movement highly dynamic.

Residents often rely on hourly forecasts to adjust outdoor routines, especially for children and older adults. Avoiding strenuous activity during peak pollution and using cleaner periods after frontal passages can reduce exposure. Real-time data also helps households decide when ventilation is beneficial versus when indoor protection should be prioritized.